CN219740351U - IO level matching interaction circuit - Google Patents
IO level matching interaction circuit Download PDFInfo
- Publication number
- CN219740351U CN219740351U CN202320361453.1U CN202320361453U CN219740351U CN 219740351 U CN219740351 U CN 219740351U CN 202320361453 U CN202320361453 U CN 202320361453U CN 219740351 U CN219740351 U CN 219740351U
- Authority
- CN
- China
- Prior art keywords
- triode
- resistor
- electrically connected
- interaction circuit
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000003993 interaction Effects 0.000 title claims abstract description 24
- 238000004891 communication Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Emergency Alarm Devices (AREA)
Abstract
The utility model discloses an IO level matching interaction circuit which is characterized by comprising a first triode (Q1), a second triode (Q2), a first resistor (R1), a first power supply (U1), a sensor module (M1) and an alarm module (M2); the collector of the first triode (Q1) is electrically connected with the base of the second triode (Q2), and the base of the first triode (Q1) is electrically connected with the sensor module (M1); the emitter of the first triode (Q1) and the emitter of the second triode (Q2) are grounded; one end of the first resistor (R1) is electrically connected with the collector electrode of the second triode (Q2), and the other end of the first resistor is electrically connected with the first power supply (U1); the collector electrode of the second triode (Q2) is electrically connected with the alarm module (M2).
Description
Technical Field
The utility model belongs to the technical field of circuits, and particularly relates to an IO level matching interaction circuit.
Background
With the increasing number of vehicles, convenience and safety are of great concern. The number of vehicle accidents per year is very high, and most driving accidents generally originate from irregular driving behaviors, and many times the driver cannot realize bad habits of the driver.
The general vehicle event data recorder provides collision signals through external sensor equipment to realize sensitive perception collision, however, the external sensor equipment is connected with the vehicle event data recorder through a general serial port mode, so that engineers are required to develop a communication protocol for matching the external sensor equipment and the vehicle event data recorder, however, the communication protocol may have unstable communication conditions, and error collision alarm of the vehicle event data recorder is easily caused.
Disclosure of Invention
The utility model aims to provide an IO level matching interaction circuit.
The IO level matching interaction circuit provided by the utility model comprises a first triode (Q1), a second triode (Q2), a first resistor (R1), a first power supply (U1), a sensor module (M1) and an alarm module (M2); the collector of the first triode (Q1) is electrically connected with the base of the second triode (Q2), and the base of the first triode (Q1) is electrically connected with the sensor module (M1); the emitter of the first triode (Q1) and the emitter of the second triode (Q2) are grounded; one end of the first resistor (R1) is connected with the collector electrode of the second triode (Q2), and the other end of the first resistor is electrically connected with the first power supply (U1); the collector electrode of the second triode (Q2) is electrically connected with the alarm module (M2).
Preferably, the IO level matching interaction circuit provided by the utility model further comprises a second resistor (R2) and a second power supply (U2); one end of the second resistor (R2) is electrically connected with the second power supply (U2), and the other end of the second resistor is electrically connected with the collector electrode of the first triode (Q1).
Preferably, the IO level matching interaction circuit provided by the utility model further comprises a third resistor (R3) and a fourth resistor (R4); the third resistor (R3) is connected between the sensor module (M1) and the base of the first triode (Q1); one end of the fourth resistor (R4) is connected to the base electrode of the first triode (Q1), and the other end of the fourth resistor is grounded.
Preferably, the resistance of the first resistor (R1) is 10K, the resistance of the second resistor (R2) is 10K, the resistance of the third resistor (R3) is 4.7K, and the resistance of the fourth resistor (R4) is 47K.
Preferably, the voltage of the first power supply (U1) is 5V, and the voltage of the second power supply (U2) is 1.8V.
Preferably, the first triode (Q1) and the second triode (Q2) are both MMBT2222 in model numbers.
Preferably, the first resistor (R1), the second resistor (R2), the third resistor (R2) and the fourth resistor (R4) are all 0402 in type.
According to the IO level matching interaction circuit provided by the utility model, the alarm module (M2) is triggered to alarm in a high-low level mode directly by adopting an interaction mode of IO switching value, so that false alarm of the alarm module (M2) can be prevented.
Drawings
FIG. 1 is a schematic diagram of an IO level matching interaction circuit provided by the utility model;
fig. 2 is a schematic diagram of high and low levels of the IO level matching interaction circuit provided by the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1-2, the IO level matching interaction circuit provided in this embodiment includes a first triode (Q1), a second triode (Q2), a first resistor (R1), a first power supply (U1), a sensor module (M1), and an alarm module (M2); the collector of the first triode (Q1) is electrically connected with the base of the second triode (Q2), and the base of the first triode (Q1) is electrically connected with the sensor module (M1); the emitter of the first triode (Q1) and the emitter of the second triode (Q2) are grounded; one end of the first resistor (R1) is electrically connected with the collector electrode of the second triode (Q2), and the other end of the first resistor is electrically connected with the first power supply (U1); the collector electrode of the second triode (Q2) is electrically connected with the alarm module (M2). It will be appreciated by those skilled in the art that when the sensor module (M1) receives a collision, a high level output is provided, at this time, because the emitter of the first triode (Q1) is grounded, the base voltage of the first triode (Q1) is greater than the voltage of the emitter of the first triode (Q1) and the voltage difference reaches the triode conducting voltage, so the first triode (Q1) is in a conducting state, the base of the second triode (Q2) is pulled down and has the same potential with the ground, so the base and the emitter of the second triode (Q2) have no voltage difference that can make them conducting, so that the second triode (Q2) is in a cut-off state, the voltage of the alarm module (M2) is pulled to the same potential as the first power supply (U1), so that the final output can be the same high level as the first power supply (U1), and the alarm module (M2) sends an alarm signal, therefore, the level switch provided by this embodiment adopts a low level switching means to directly trigger the alarm module (IO) to trigger the high level switching means, so that the alarm module (IO) can be prevented from false triggering the alarm module (M2).
Further, the IO level matching interaction circuit provided by the embodiment further comprises a second resistor (R2) and a second power supply (U2); one end of the second resistor (R2) is electrically connected with the second power supply (U2), and the other end of the second resistor is electrically connected with the collector electrode of the first triode (Q1). It will be appreciated by those skilled in the art that when the sensor module (M1) does not receive the collision signal, the sensor module (M1) does not output an electrical signal, and the base voltage of the first triode (Q1) is at the same potential as the emitter voltage, so that the first triode (Q1) is in an off state, the base of the second triode (Q2) is pulled up to the same potential by the second resistor (R2), and the emitter of the second triode (Q2) is at the same potential as the ground, so that the base voltage of the second triode (Q2) is greater than the voltage of the emitter of the second triode (Q2) and the voltage difference reaches the triode on voltage, so that the second triode (Q2) is in an on state, so that the collector voltage of the second triode (Q2) is pulled down to the same potential as the ground, and thus the output voltage of the final alarm module (M2) is at the 0 level, so that the alarm module (M2) will not alarm.
Further, the IO level matching interaction circuit provided in this embodiment further includes a third resistor (R3) and a fourth resistor (R4); the third resistor (R3) is connected between the sensor module (M1) and the base of the first triode (Q1); one end of the fourth resistor (R4) is connected to the base electrode of the first triode (Q1), and the other end of the fourth resistor is grounded. It can be understood by those skilled in the art that the third resistor (R3) and the fourth resistor (R4) are used for limiting current, so as to protect the IO level matching interaction circuit provided in this embodiment, prevent the first triode (Q1) and the second triode (Q2) from being damaged due to excessive current, and improve the reliability of the IO level matching interaction circuit provided in this embodiment.
Further, the first resistor (R1) has a resistance of 10K, the second resistor (R2) has a resistance of 10K, the third resistor (R3) has a resistance of 4.7K, and the fourth resistor (R4) has a resistance of 47K.
Further, the voltage of the first power supply (U1) is 5V, and the voltage of the second power supply (U2) is 1.8V.
Further, the first triode (Q1) and the second triode (Q2) are both MMBT2222 in model numbers. Those skilled in the art will appreciate that the first transistor (Q1) and the second transistor (Q2) are NPN transistors.
Further, the first resistor (R1), the second resistor (R2), the third resistor (R3) and the fourth resistor (R4) are all 0402 in type.
Those skilled in the art will appreciate that the present utility model uses 2 transistors and some matching resistors to perform level switching. The method has the following characteristics:
level conversion: since the IO of the sensor module is a 1.8V pin, level conversion is required to convert to the required 5V output.
The level corresponds to: the high output at the sensor module will turn high when the signal output to the alarm module is high, and the low output at the sensor module will turn low when the signal output to the alarm module is low.
The Boot stage is not triggered by mistake: because the program of the boot stage is not controlled (original factory design), the actual measurement of the boot stage does not lead to output of high level so as to be misjudged.
The following shall be described: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (7)
1. The IO level matching interaction circuit is characterized by comprising a first triode (Q1), a second triode (Q2), a first resistor (R1), a first power supply (U1), a sensor module (M1) and an alarm module (M2); the collector of the first triode (Q1) is electrically connected with the base of the second triode (Q2), and the base of the first triode (Q1) is electrically connected with the sensor module (M1); the emitter of the first triode (Q1) and the emitter of the second triode (Q2) are grounded; one end of the first resistor (R1) is connected with the collector electrode of the second triode (Q2), and the other end of the first resistor is electrically connected with the first power supply (U1); the collector electrode of the second triode (Q2) is electrically connected with the alarm module (M2).
2. The IO level matching interaction circuit according to claim 1, further comprising a second resistor (R2) and a second power supply (U2); one end of the second resistor (R2) is electrically connected with the second power supply (U2), and the other end of the second resistor is connected with the collector electrode of the first triode (Q1).
3. The IO level matching interaction circuit according to claim 2, further comprising a third resistor (R3) and a fourth resistor (R4); the third resistor (R3) is connected between the sensor module (M1) and the base of the first triode (Q1); one end of the fourth resistor (R4) is connected to the base electrode of the first triode (Q1), and the other end of the fourth resistor is grounded.
4. The IO level matching interaction circuit of claim 3, wherein the first resistor (R1) has a resistance of 10K, the second resistor (R2) has a resistance of 10K, the third resistor (R3) has a resistance of 4.7K, and the fourth resistor (R4) has a resistance of 47K.
5. The IO level matching interaction circuit of claim 4, wherein the voltage of the first power supply (U1) is 5V and the voltage of the second power supply (U2) is 1.8V.
6. The IO level matching interaction circuit of claim 5, wherein the first transistor (Q1) and the second transistor (Q2) are each of the type MMBT2222.
7. The IO level matching interaction circuit of claim 6, wherein the first resistor (R1), the second resistor (R2), the third resistor (R3) and the fourth resistor (R4) are all 0402 in type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320361453.1U CN219740351U (en) | 2023-03-01 | 2023-03-01 | IO level matching interaction circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320361453.1U CN219740351U (en) | 2023-03-01 | 2023-03-01 | IO level matching interaction circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219740351U true CN219740351U (en) | 2023-09-22 |
Family
ID=88026828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320361453.1U Active CN219740351U (en) | 2023-03-01 | 2023-03-01 | IO level matching interaction circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219740351U (en) |
-
2023
- 2023-03-01 CN CN202320361453.1U patent/CN219740351U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4745339A (en) | Lamp failure detecting device for automobile | |
| US4255748A (en) | Bus fault detector | |
| CN112327211B (en) | Vehicle-mounted microphone power supply connection state monitoring circuit and method | |
| CN113167822A (en) | Automatic detection device for connection between electronic devices | |
| JP4736569B2 (en) | Inductive load abnormality detection device | |
| CN106683604B (en) | Multiplexing processing circuit for L ED display and key detection | |
| CN219740351U (en) | IO level matching interaction circuit | |
| CN112051463B (en) | Plug detection circuit of vehicle-mounted diagnosis system and vehicle management system | |
| CN216485439U (en) | Antenna detection circuit | |
| CN110745118A (en) | Electronic parking switch and vehicle | |
| JPH06232712A (en) | Protection device for load controller | |
| CN114720724A (en) | Wheel speed sensor diagnosis device, method and system and vehicle | |
| CN112033580B (en) | Temperature sensing unit disconnection detection system, disconnection detection method and electric vehicle | |
| US11418052B2 (en) | Power circuit and driving method thereof | |
| CN204807641U (en) | Electronic load detection circuitry and control system who has electronic load detection function | |
| CN114384839A (en) | Vehicle-mounted key state detection system and detection method thereof | |
| CN220924038U (en) | Angular radar communication control circuit and vehicle control system | |
| CN219997252U (en) | Switch detection device, domain controller, automobile chassis and automobile | |
| CN217034545U (en) | Vehicle-mounted key state detection system | |
| CN220173217U (en) | Anti-false triggering latch circuit control structure | |
| CN217388208U (en) | Detection control circuit and vehicle | |
| CN219857466U (en) | Detection system for starting-up mode of electric valve of electric two-wheel vehicle | |
| CN219192122U (en) | Circuit for identifying ignition and flameout of vehicle | |
| CN219611759U (en) | Electromechanical device access sensor circuit structure | |
| CN220043392U (en) | Control circuit and electronic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |